/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package paw.eltabique.web.servlet;

import java.io.IOException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import paw.eltabique.domain.Usuario;
import paw.eltabique.service.exceptions.UserNotFoundException;
import paw.eltabique.service.impl.UsuarioServiceImpl;
import paw.eltabique.service.interfaces.UsuarioService;

/**
 *
 * @author usuario_local
 */
@WebServlet(name="Login", urlPatterns={"/login"})
public class Login extends HttpServlet {

    UsuarioService usuarioService = new UsuarioServiceImpl();

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
     
            HttpSession session = request.getSession();
            

            String nombre = request.getParameter("nombre");
            String role = request.getParameter("tipo");
            if(nombre != null && role != null) {
                try {
                    if(usuarioService.checkAuth(nombre,role)) {
                      Usuario usuario = usuarioService.getByName(nombre);
                      session.setAttribute("usuario_data", usuario);
                    }
                } catch (UserNotFoundException e) {
                    request.setAttribute("error", e.getMessage());
                }
            }
            else{
              String action = request.getParameter("action");
              if(action != null){
                session.invalidate();
              }
            }

            doGet(request, response);
            
    } 

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        Usuario usr = (Usuario)request.getSession().getAttribute("usuario_data");
        if(usr != null)
          response.sendRedirect("index");
        else{
          RequestDispatcher reqDispatcher =
                  getServletConfig().getServletContext().getRequestDispatcher("/WEB-INF/views/login.jsp");
          reqDispatcher.forward(request,response);
        }
    } 

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
